Improved partonic event generators at lepton colliders

TL;DR

This paper introduces an advanced phase space integration method for multi-jet cross sections at lepton colliders, enhancing convergence and infra-red safety in parton-level Monte Carlo simulations at any perturbative order.

Contribution

It presents a novel phase space integration technique that improves convergence and extends infra-red safety for multi-jet cross sections in lepton collider simulations.

Findings

Enhanced convergence of Monte Carlo integrations.

Extension of infra-red safety to fully differential multi-jet cross sections.

Applicable to both massless and massive non-jet objects.

Abstract

A method is detailed for the phase space integration of multi-jets cross sections at lepton colliders, applicable to parton level Monte Carlo's at any order in perturbation theory. Other non-jet objects, massless or massive, can be included in the phase space generation. We correlate the bremsstrahlung events in a manner that integrates out all partonic configurations leading to a fixed jet configuration, thereby improving convergence. This also allows the method to extend infra-red safety to the fully differential multi-jet cross section.